Probably in Arabia in ancient times. The Arabs were the first to introduce the concept of 'zero'.
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The tally marks I'm familiar with cannot have negative numbers because they are used to count real things and there cannot be a negative apple
europeans
The difference between two negative numbers is negative if the second number ( the number you are subtracting from the first) is less in value than the first. For example (-3) - ( -2) = -3 + 2 = -1 (-3) - (-4) = -3 + 4 = + 1
Negative times negative equals positive. Positive times positive equals positive. Positive times negative equals negative. If you have more than two numbers, multiply the first two and then apply these rules to each successive number in turn.